Comment 22 for bug 1960633

Focal verification done:

root@focal-vm:~# uname -r
5.4.0-106-generic
root@focal-vm:~# dpkg -l| grep linux-modules
ii linux-modules-5.4.0-104-generic 5.4.0-104.118 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-106-generic 5.4.0-106.120 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP

No linux-modules-extra package is installed yet, virtio_gpu can be loaded:

root@focal-vm:~# modprobe virtio_gpu
root@focal-vm:~# lsmod | grep virtio_gpu
virtio_gpu 57344 0
ttm 106496 1 virtio_gpu
drm_kms_helper 184320 2 virtio_gpu
drm 491520 4 drm_kms_helper,virtio_gpu,ttm

Same for vmwfg:

root@focal-vm:~# modprobe vmwgfx
root@focal-vm:~# lsmod | grep vmwgfx
vmwgfx 299008 0
ttm 106496 2 vmwgfx,virtio_gpu
drm_kms_helper 184320 3 vmwgfx,virtio_gpu
drm 491520 5 vmwgfx,drm_kms_helper,virtio_gpu,ttm

And the modules now show in linux-modules-5.4.0-106-generic.list but not in -104-generic:

root@focal-vm:~# grep -E '(virtio-gpu|vmwgfx)\.ko' /var/lib/dpkg/info/linux-modules-5.4.0-10{4,6}-generic.list
/var/lib/dpkg/info/linux-modules-5.4.0-106-generic.list:/lib/modules/5.4.0-106-generic/kernel/drivers/gpu/drm/virtio/virtio-gpu.ko
/var/lib/dpkg/info/linux-modules-5.4.0-106-generic.list:/lib/modules/5.4.0-106-generic/kernel/drivers/gpu/drm/vmwgfx/vmwgfx.ko